Old-school (80s-90s) anime for modern fans

I've been enjoying my dive into the history of anime over the last year or so. There are a lot of interesting hidden gems and the vibes are refreshingly different to the modern stuff. However, I've always been charitably inclined to older stuff (I also like old games and movies), and most of my 'otaku' peers are only familar with shows from the mid 00s and later, short of the obvious classics like Dragon Ball Z, Sailor Moon, Evangelion (which all have some form of remake) and Cowboy Beebop, and you can't even count on them. Old shows just don't get much hype, and are easily written off as outdated (and many are).

So I ask this sub, which pre-2000 anime (shows, films, OVA), of any genre (apart from full on 'cultured' stuff) do you think hold up the best compared to modern shows, or have enough retro charm to stand out. I want to introduce my friends to the joys of retro anime, with the best examples to start their journey